All Questions
Tagged with hall-effect electrical-resistance
6
questions
2
votes
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answers
85
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Quantum Hall effect diverges at $B=0$
In the integer quantum Hall effect, with the applied magnetic field reduced, more and more LLs get filled and one can observe higher and higher plateaus in the Hall conductivity $\sigma_H(B)$. ...
- 3,701
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Is diamagnetic part of conductivity always longitudinal/diagonal?
The Kubo formula for linear response is given as $$\sigma_{ab}(\omega)=\frac{i}{\omega}[\Pi_{ab}(\omega)-\Pi_{ab}(\omega=0)]$$ with $\Pi$ the current-current correlation. It is often claimed that the ...
- 3,701
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votes
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answer
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How does the conductivities of metals and semiconductors vary when placed in the presence of magnetic field?
Suppose you have two materials one is a metal and other is a heavily doped semiconductor and they are placed in a magnetic field. What experiment will you do to distinguish between them? Does the ...
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Why doesn't the classical model of electrical conduction work with iron, cadmium and bismuth?
My textbook says this:
In most metals, the charge carriers are electrons and the charge - carrier density determined from Hall - effect measurements is in good agreement with calculated values for ...
- 3,340
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votes
1
answer
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Longitudinal conductivity from density of states (DOS)
It is well-known that using the so-called Streda formula, the transversal conductivity $\sigma_{xy}$ and thus the Hall conductivity in a two-dimensional material is given as the derivative of the ...
- 117
9
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Does the Hall effect increase the resistance of a wire?
If a current in a wire is flowing perpendicular to a magnetic field, the Hall effect is observed. This effect is caused by the forces from magnetic fields pushing the electrons to one side of the wire....
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